nelson mandela's day is done. the news expected and still unwelcome reached us in the united states and suddenly our world became somber. our skies were lead ened. his day is done. >> schieffer: we're going to close our broadcast this morning with your poem, but i wanted to ask you, how did you come to write this? how did this come about and when did you do it? >> thank you. the state department approached me -- state department telephoned me when he was very sick about a year and half ago asked if i would write a poem -- write a tribute to him from my people, from the american people. and i said, yes. i wrote it, but also had to agree that i would not even speak about it or release it until 48 hours after he was actually dead and i agreed. so i did it and i sent it to them, to the state department. the state department sent a crew down and i recorded it. but then i never mentioned it again to anyone, including -- close friends and family members. i just wouldn't do it. >> schieffer: you didn't mention it to us, w